When deputy constables visited Collins' Sunshine Ridge Lane home for a welfare check, they smelled gas and called in firefighters.

"The incident is still under review, but no foul play is suspected at this time," the sheriff's office said in a statement at the time. Now, the Harris County Institute of Forensic Sciences lists streptococcus pneumoniae bacterial meningitis as the cause of death.

Collins was assigned to the sheriff's Justice Management Bureau, which oversees prisoner processing and courthouse security.